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        <td><h2><font color="#FFFFFF">Each Box Explained </font></h2></td>
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<p>Sessions in Tetrad are built up by placing boxes on the main workspace area, connecting them up with arrows, and
    building modules in each box that depending on parent modules that have already been built. (See <a
            href="../main_workspace/how_to_build_a_session.html">How to Build a Session</a> for an example. For a
    discussion of how arrows create dependencies between boxes, see <a href="../common_tasks/destroying_models.html">Flowchart
        Dependencies</a>.) </p>
<p>Boxes are things that look like this:</p>
<p><img height="204" src="../images/objects.png" width="440"></p>
<p>Each box can contain one of a specific list of modules, and which modules are available depends on what modules are
    in the parent boxes for that box. Here we discuss each box in particular, list the types of modules it can contain,
    and provide links to explanations for those modules. If you'd prefer to go directly to explanations of modules, see
    <a href="each_module_explained.html">Each Module Explained</a>.</p>
<p><a href="graph/graph_box.html">Graph Box</a></p>
<p><a href="pm/pm_box.html">Parametric Model (PM) Box</a></p>
<p><a href="im/im_box.html">Instantiated Model (IM) Box</a></p>
<p><a href="data/data_box.html">Data Box</a></p>
<p><a href="manipulated_data/manipulated_data_box.html">Manipulated Data Box</a></p>
<p><a href="estimate/estimate_box.html">Estimate Box</a></p>
<p><a href="update/update_box.html">Update Box</a></p>
<p><a href="search/search_box.html">Search Box</a></p>
<p><a href="regression/regression_box.html">Regression Box</a></p>
<p><a href="classify/classify_box.html">Classify Box</a></p>
<p><a href="compare/compare_box.html">Compare Box </a></p>
<p>&nbsp;</p>
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